Portable ergonomic seat support



FIG. 1 is a top perspective view of a portable ergonomic seat support showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a side elevational view thereof, the opposite side being a mirror image thereof. 

The ornamental design for a portable ergonomic seat support, as shown and described. 